1.  RESEAU DU FOLLIS, HAUTE SAVOIE

FRANCE

1455

2.  RESEAU DE LA PIERRE ST. MARTIN

FRANCE

1321

3.  SNEZHANAYA, CAUCASUS

RUSSIA

1280

4.  SISTEMA HUAUTLA

MEXICO

1220

5.  GOUFFRE BERGER

FRANCE

1198

6.  SIMA DE UKENDI

SPAIN

1185

7.  AVENC B15, PYRENEES

SPAIN

1150

8.  SCHNEELOCH, SALZBURG

AUSTRIA

1111

9.  SIMA, G.E.S., MALAGA

SPAIN

1098

10.LAMPRECHTSOFEN

AUSTRIA

1024

11.RESEAU FELIX TROMBE

FRANCE

1018

12.OGOF FLYNNON DDU, POWYS

WALES

 308

13.GIANTS HOLE-OXLOW CAVERNS, DERBYSHIRE

ENGLAND

 214

14.REYFAD POT, FERMANAGH

NORTH IRELAND

 179

15.CARROWMORE CAVERN

REPUBLIC OF IRELAND

 140